129868244 has 24 divisors (see below), whose sum is σ = 251636448. Its totient is φ = 58148640.

The previous prime is 129868237. The next prime is 129868247. The reversal of 129868244 is 442868921.

It is a Harshad number since it is a multiple of its sum of digits (44).

It is a junction number, because it is equal to n+sod(n) for n = 129868195 and 129868204.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (129868247) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 19079 + ... + 24974.

It is an arithmetic number, because the mean of its divisors is an integer number (10484852).

Almost surely, 2^129868244 is an apocalyptic number.

It is an amenable number.

129868244 is a deficient number, since it is larger than the sum of its proper divisors (121768204).

129868244 is a wasteful number, since it uses less digits than its factorization.

129868244 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 44135 (or 44133 counting only the distinct ones).

The product of its digits is 221184, while the sum is 44.

The square root of 129868244 is about 11395.9749034473. The cubic root of 129868244 is about 506.4085032518.

The spelling of 129868244 in words is "one hundred twenty-nine million, eight hundred sixty-eight thousand, two hundred forty-four".